Power-on Control Method, Device, Electronic Device and Readable Storage Medium of Relay

Abstract

The present invention provides a power-on control method, device, electronic device and readable storage medium for a relay, which relates to the technical field of battery pack pre-charge control, and includes: obtaining the actual upper limit and lower limit of the pre-charge ratio of the battery pack; determining a target setting threshold and a target time based on the upper limit of the pre-charge ratio, the lower limit of the pre-charge ratio, the maximum pre-charge time of the battery pack and the relay life requirement; when it is detected that the pre-charge ratio of the battery pack reaches the target setting threshold, delaying the target time and then controlling the relay to be powered on, so as to solve the technical problem that in the battery pack pre-charge scenario, the relay will be subjected to a large impact when it is powered on and attracted, thereby resulting in poor relay life.

Description

Technical Field

[0001] The present invention relates to the technical field of battery pack pre-charge control, and in particular, to a power-on control method, device, electronic device, and readable storage medium for a relay. Background Art

[0002] With the development of electric vehicle technology, users have higher requirements for driving experience. Currently, pre-charge control is often performed on the battery pack to ensure that the vehicle battery pack can obtain the power sufficient to support the current trip before the user starts the vehicle.

[0003] When the pre-charge ratio of the current battery pack reaches the requirement, the pre-charge operation is generally terminated by powering on the relay. However, in actual application, the relay will be subject to a large impact when it is powered on and attracted, resulting in poor relay life. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a power-on control method, device, electronic device, and readable storage medium for a relay, so as to solve the technical problem that in the battery pack pre-charge scenario, the relay will be subject to a large impact when it is powered on and attracted, thereby resulting in poor relay life.

[0005] In a first aspect, an embodiment provides a power-on control method for a relay, the method including:

[0006] Obtain the actual upper limit and lower limit of the pre-charge ratio of the battery pack;

[0007] Based on the upper limit of the pre-charge ratio, the lower limit of the pre-charge ratio, the maximum pre-charge time of the battery pack, and the relay life requirement, determine the target setting threshold and the target time;

[0008] When it is detected that the pre-charge ratio of the battery pack reaches the target setting threshold, delay the target time and then control the relay to power on.

[0009] In an optional implementation manner, the step of obtaining the actual upper limit and lower limit of the pre-charge ratio of the battery pack includes:

[0010] Obtain the actual upper limit of the pre-charge ratio, the lower limit of the pre-charge ratio, and the maximum pre-charge time of the battery pack during the pre-charge process.

[0011] In an optional implementation manner, the step of determining the target setting threshold and the target time based on the upper limit of the pre-charge ratio, the lower limit of the pre-charge ratio, the maximum pre-charge time of the battery pack, and the relay life requirement includes:

[0012] Based on the upper limit of the pre-charge ratio and the maximum pre-charge time of the battery pack, determine the target time;

[0013] Determine whether the relay with delayed power-on meets the relay life requirement according to the lower limit of the pre-charge ratio and the target time;

[0014] If it meets the requirement, determine the target setting threshold according to the lower limit of the pre-charge ratio, the target time and the relay life requirement;

[0015] If it does not meet the requirement, repeat the above steps until the target setting threshold is determined.

[0016] In an alternative embodiment, the step of determining the target time based on the upper limit of the pre-charge ratio and the maximum pre-charge time of the battery pack includes:

[0017] Determine the pre-charge ratio at each moment based on the pre-charge ratio time curve of the battery pack;

[0018] Determine the target time according to the principle that after delaying the target time by the pre-charge time corresponding to the upper limit of the pre-charge ratio, it does not exceed the maximum pre-charge time of the battery pack.

[0019] In an alternative embodiment, the step of determining the target setting threshold according to the lower limit of the pre-charge ratio, the target time and the relay life requirement includes:

[0020] Determine the pre-charge ratio at each moment based on the pre-charge ratio time curve of the battery pack;

[0021] Delay the moment corresponding to the lower limit of the pre-charge ratio by the target time to obtain the target lower limit of the pre-charge ratio;

[0022] Determine the target setting threshold according to the principle that the target lower limit of the pre-charge ratio meets the relay life requirement and the principle that after delaying the target time by the pre-charge time corresponding to the upper limit of the pre-charge ratio, it does not exceed the maximum pre-charge time of the battery pack.

[0023] In an alternative embodiment, the step of delaying the target time and then controlling the relay to power on when it is detected that the pre-charge ratio of the battery pack reaches the target setting threshold includes:

[0024] Detect the pre-charge ratio of the battery pack by means of voltage sampling;

[0025] When the pre-charge ratio reaches the target setting threshold, wait for the target time to elapse and then control the relay to power on and close.

[0026] In an alternative embodiment, before the step of delaying the target time and then controlling the relay to power on when it is detected that the pre-charge ratio of the battery pack reaches the target setting threshold, the method further includes:

[0027] Lower the initial setting threshold of the battery by a preset ratio to obtain a target setting threshold.

[0028] In a second aspect, an embodiment provides a power-on control device for a relay. The device includes:

[0029] An acquisition module that acquires the actual upper limit and lower limit of the pre-charge ratio of the battery pack;

[0030] A determination module that determines a target setting threshold and a target time based on the upper limit of the pre-charge ratio, the lower limit of the pre-charge ratio, the maximum pre-charge time of the battery pack, and the relay life requirement;

[0031] A control module that, when detecting that the pre-charge ratio of the battery pack reaches the target setting threshold, delays the target time and then controls the relay to be powered on.

[0032] In a third aspect, an embodiment provides an electronic device, including a memory and a processor. A computer program that can run on the processor is stored in the memory. When the processor executes the computer program, the steps of the method described in any one of the foregoing embodiments are implemented.

[0033] In a fourth aspect, an embodiment provides a machine-readable storage medium. The machine-readable storage medium stores machine-executable instructions. When the machine-executable instructions are called and executed by a processor, the machine-executable instructions cause the processor to implement the steps of the method described in any one of the foregoing embodiments.

[0034] A power-on control method, device, electronic device, and readable storage medium provided by an embodiment of the present invention acquire the corresponding actual upper and lower limits of the pre-charge ratio during the pre-charge detection of the battery pack, and then, according to the maximum pre-charge time of the battery pack and the relay life requirement, can determine the target setting threshold actually used to trigger the relay to be powered on and the target time for delaying the power-on when the target setting threshold is reached. Controlling the relay to be powered on based on the target setting threshold and the target time can ensure that the impact on the actual relay when it is powered on is still within the relay life requirement even if there is an error in the preset ratio of the detection sampling, thereby guaranteeing the application reliability of the relay.

[0035] Other features and advantages of the present disclosure will be described in the subsequent specification, or, some features and advantages can be inferred from the specification or determined without doubt, or can be known by implementing the above technologies of the present disclosure.

[0036] To make the above objects, features, and advantages of the present disclosure more obvious and understandable, the following specifically enumerates preferred embodiments and, in conjunction with the accompanying drawings, makes a detailed description as follows. Description of the Drawings

[0037] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0038] Figure 1 It is a schematic diagram of the curve of the pre-charge ratio and time of a traditional battery pack;

[0039] Figure 2 It is a flowchart of a method for controlling the power-on of a relay provided by an embodiment of the present invention;

[0040] Figure 3 It is a schematic diagram of the curve of the pre-charge ratio and time of a battery pack provided by an embodiment of the present invention;

[0041] Figure 4 It is a functional module diagram of a device for controlling the power-on of a relay provided by an embodiment of the present invention;

[0042] Figure 5 It is a schematic diagram of the hardware architecture of an electronic device provided by an embodiment of the present invention. Specific Embodiments

[0043] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions of the present invention with reference to the drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0044] In the current pre-charge control strategy, the battery management system BMS detects the pre-charge ratio of the battery pack through voltage sampling. If the collected pre-charge ratio reaches the set threshold, it controls the relay to pull in and power on. However, due to errors in the voltage sampling method, the collected pre-charge ratio is inconsistent with the actual pre-charge ratio, which will cause a large impact on the actually pulled-in and powered-on relay, thereby affecting its service life.

[0045] For the sake of easy understanding, an example is given here for illustration. For example, Figure 1 as shown, the set threshold K1 of the pre-charge ratio is 95%. At this time, the pre-charge ratio obtained by voltage sampling is 95%, so the collected pre-charge ratio reaches the set threshold, and the relay can be controlled to power on, thereby completing the termination of the pre-charge operation. However, the actual pre-charge ratio may not be 95%, but the lower limit K of the pre-charge ratio 1min 93% or the upper limit K of the pre-charge ratio1max 97%.

[0046] Among them, the upper limit of the pre-charging ratio is Figure 1 the position shown by label 1. At this time, the pre-charging ratio is the largest and the required pre-charging time is the longest. This pre-charging time needs to satisfy t max . The lower limit of the pre-charging ratio is Figure 1 the position shown by label 2. At this time, the pre-charging ratio is the smallest K min , and the impact on the relay when it is energized and closed at this time is the largest. The greater the impact, the worse the relay life.

[0047] Based on this, an on-power control method, device, electronic device, and readable storage medium for a relay provided by an embodiment of the present invention can solve the technical problem that in the pre-charging scenario of a battery pack, the relay will be subjected to a large impact when it is energized and closed, thereby resulting in a poor relay life.

[0048] For the convenience of understanding this embodiment, first, a detailed introduction is given to an on-power control method based on a relay disclosed in an embodiment of the present invention. This method can be applied to a battery management system BMS, or other vehicle-mounted controllers, battery control devices, etc.

[0049] Figure 2 It is a flowchart of an on-power control method for a relay provided by an embodiment of the present invention.

[0050] As Figure 2 shown, the method includes the following steps:

[0051] Step S102, obtain the actual upper limit and lower limit of the pre-charging ratio of the battery pack.

[0052] Among them, the upper and lower limits of the pre-charging ratio here can be understood as the actual upper and lower limits of the pre-charging ratio corresponding to the pre-charging ratio detected by voltage sampling during the pre-charging process of the battery pack.

[0053] Step S104, based on the upper limit of the pre-charging ratio, the lower limit of the pre-charging ratio, the maximum pre-charging time of the battery pack, and the relay life requirement, determine the target setting threshold and the target time.

[0054] Among them, the target setting threshold can be understood as the trigger threshold for the on-power operation of the relay in an embodiment of the present invention, and the target time can be understood as the time when the relay needs to delay the on-power operation when the trigger threshold is reached. The maximum pre-charging time of the battery pack is the maximum time in the pre-charging scenario of the battery pack, that is, in order to ensure the safety of battery application, the pre-charging operation of the battery pack cannot exceed the maximum time.

[0055] Step S106, when it is detected that the pre-charging ratio of the battery pack reaches the target setting threshold, delay the target time and then control the relay to be powered on.

[0056] It should be noted that the pre-charge ratio detected here may not be the actual true pre-charge ratio. However, according to the target set threshold and target time, the embodiments of the present invention can ensure that the impact on the relay when powered on does not exceed the relay life requirement.

[0057] In a preferred embodiment of practical application, during the pre-charge detection of the battery pack, the upper and lower limits of the corresponding actual pre-charge ratio are obtained. Then, based on the maximum pre-charge time of the battery pack and the relay life requirement, the target set threshold for actually triggering the relay to power on and the target time for delaying the power on until the target set threshold is reached can be determined. Controlling the relay to power on based on the target set threshold and target time can ensure that the impact on the actual relay when powered on is still within the relay life requirement even if there is an error in the preset ratio detected by sampling.

[0058] It can be understood that the embodiments of the present invention are aware that the error in sampling the pre-charge ratio during the pre-charge process of the battery pack will affect the service life of the relay when powered on. Instead of using a conventional correction method to correct the accuracy of the sampled pre-charge ratio and thus obtain the precise relay power-on timing, through creative labor, without considering this sampling error, the preset ratio set threshold and the target time for delaying the power on are re-determined to ensure the reliability of the relay when powered on.

[0059] In some embodiments, to more clearly illustrate the acquisition of the upper and lower limits of the pre-charge ratio, step S102 is described, which may include:

[0060] Step 1.1), obtaining the actual upper limit of the pre-charge ratio, the lower limit of the pre-charge ratio, and the maximum pre-charge time during the pre-charge process of the battery pack.

[0061] Among them, by collecting the actual voltage, current and other charging parameters during the pre-charge process of the battery pack, the pre-charge ratio calculated by the voltage sampling detection method and the actual corresponding pre-charge ratio range can be obtained, and this range includes the upper limit and the lower limit of the pre-charge ratio.

[0062] It can be understood that the maximum pre-charge time of the battery pack can be obtained in advance and is determined based on the model of the battery pack and the charging parameters during the pre-charge process.

[0063] In some embodiments, step S104 can also be implemented through the following steps, specifically including:

[0064] Step 2.1), determining the target time based on the upper limit of the pre-charge ratio and the maximum pre-charge time of the battery pack.

[0065] Exemplarily, based on the pre-charge ratio time curve of the battery pack, the pre-charge ratio at each moment is determined. This pre-charge ratio time curve can be as Figure 3As shown; determine the target time according to the principle that after delaying the target time by the pre-charge time corresponding to the upper limit of the pre-charge ratio, it does not exceed the maximum pre-charge time of the battery pack.

[0066] Among them, after delaying the pre-charge time corresponding to the current upper limit of the pre-charge ratio, it cannot exceed the maximum pre-charge time either, so as to meet the application safety of the battery pack. Furthermore, a delayable time range can be determined, that is, any time within this time range is selected as the target time for delay, and the current principle can be met.

[0067] As a preferred embodiment, the longer the delay time, the smaller the upper limit of the pre-charge ratio. Furthermore, it is inclined to select the largest time point from the time range as the target time.

[0068] Step 2.2), according to the lower limit of the pre-charge ratio and the target time, determine whether the relay for delayed power-on meets the relay life requirement.

[0069] Among them, delay the lower limit of the pre-charge ratio according to the target time determined in the previous step to obtain a new result of the lower limit of the pre-charge ratio after delay, and determine whether the new result of the lower limit of the pre-charge ratio meets the relay life requirement at this time, that is, when the relay is powered on and attracted under the action of the new result of the lower limit of the pre-charge ratio at this time, determine whether it will be subjected to an impact exceeding the maximum that the relay can withstand.

[0070] Step 2.3), if it is satisfied, determine the target setting threshold according to the lower limit of the pre-charge ratio, the target time and the relay life requirement.

[0071] It should be noted that if the impact on the relay when it is attracted and powered on under the action of the new result of the lower limit of the pre-charge ratio is within the range that the relay can withstand, set the target setting threshold according to the target time determined above.

[0072] Exemplarily, based on the pre-charge ratio time curve of the battery pack, determine the pre-charge ratio at each moment; delay the moment corresponding to the lower limit of the pre-charge ratio by the target time to obtain the target lower limit of the pre-charge ratio; determine the target setting threshold according to the principle that the target lower limit of the pre-charge ratio meets the relay life requirement and the principle that after delaying the pre-charge time corresponding to the upper limit of the pre-charge ratio by the target time, it does not exceed the maximum pre-charge time of the battery pack.

[0073] Among them, since the pre-charge time is delayed and the upper limit of the pre-charge ratio also needs to reach within the maximum pre-charge time, it is also necessary to re-determine the pre-charge ratio setting threshold. At the same time, the target setting threshold also needs to ensure that the delayed lower limit of the pre-charge ratio can meet the relay life requirement.

[0074] In some embodiments, before step S106, it further includes: lowering the initial setting threshold of a preset proportion of the battery to obtain a target setting threshold. It can be understood that only by reducing the pre-charge proportion setting threshold can it be ensured that even if the pre-charge operation is delayed, the maximum pre-charge time will not be exceeded.

[0075] Step 2.4), if not satisfied, repeat the above steps 2.1)-2.2) until the target setting threshold is determined.

[0076] When the pre-charge proportion setting threshold K2 (target setting threshold) of the embodiment of the present invention is reached, after delaying a target time t delay then the relay is pulled in and the pre-charge is completed.

[0077] As Figure 3 can be seen from the pre-charge proportion time curve shown, during the pre-charge process of the battery pack, the increasing rate of the pre-charge proportion gradually slows down; by increasing the relay power-on delay time in the embodiment of the present invention, the lower limit of the pre-charge proportion can be greatly increased when the relay is powered on, thereby reducing the impact on the relay and improving the relay life.

[0078] Among them, the upper limit K of the pre-charge proportion 2max is the maximum pre-charge proportion. As shown at the position marked 1 in Figure 3 , the pre-charge time required to reach this proportion upper limit is the longest. At this time, the pre-charge time plus the delay time must meet the principle that it cannot exceed the pre-charge time requirement t max .

[0079] In addition, during the pre-charge process, since the increasing rate of the pre-charge proportion gradually slows down, on the premise of meeting the pre-charge time, the current pre-charge proportion setting threshold K2 (target setting threshold) only needs to be slightly smaller than the initial pre-charge proportion setting threshold.

[0080] The lower limit K of the pre-charge proportion 2min , as shown at the position marked 2 in Figure 3 , if the relay is pulled in at this time, the relay will be greatly impacted.

[0081] In the embodiment of the present invention, after delaying for a time t 2min at the lower limit K of the pre-charge proportion, as shown at the position marked 3 in delay Figure 3 , the pre-charge proportion at this time has a large increase compared with that before the delay, thereby greatly reducing the impact on the relay when it is pulled in, improving the relay life, or replacing a lower-specification relay to reduce costs.

[0082] ​In some embodiments, the pre-charge termination of the battery pack is based on the energization and closing of the relay. To ensure timely termination of the battery pack's pre-charge while not affecting the service life of the relay, it can be known specifically through step S106, which may specifically include:

[0083] Step 3.1), detecting the pre-charge ratio of the battery pack through voltage sampling.

[0084] Step 3.2), when the pre-charge ratio reaches the target set threshold, wait for the target time after the delay, and then control the relay to be energized and closed.

[0085] At this time, even if the pre-charge ratio obtained by voltage sampling is not accurate, through the target time and target set threshold determined by the steps of the foregoing embodiments, it is possible to terminate the pre-charge process of the battery pack within the maximum pre-charge time and ensure the reliability of the relay's energization and closing.

[0086] As Figure 4 shown, an embodiment of the present invention further provides a power-on control device 200 for a relay. The device includes:

[0087] An acquisition module 201, which acquires the upper limit and lower limit of the actual pre-charge ratio of the battery pack;

[0088] A determination module 202, which determines the target set threshold and target time based on the upper limit of the pre-charge ratio, the lower limit of the pre-charge ratio, the maximum pre-charge time of the battery pack, and the relay life requirement;

[0089] A control module 203, when detecting that the pre-charge ratio of the battery pack reaches the target set threshold, delays the target time and then controls the relay to be powered on.

[0090] In a preferred embodiment of practical application, the acquisition module first acquires the upper and lower limits of the actual pre-charge ratio corresponding to the battery pack during the pre-charge detection process. The determination module can then determine the target set threshold actually used to trigger the relay to be powered on and the target time for delaying the power-on when the target set threshold is reached according to the maximum pre-charge time of the battery pack and the relay life requirement. The control module controls the relay to be powered on based on the target set threshold and target time, and can ensure that even if there is an error in the preset ratio detected and sampled, the impact on the actual relay when it is powered on is still within the relay life requirement, including the reliability of the relay's power-on and the battery pack's pre-charge.

[0091] In some embodiments, the acquisition module 201 is further specifically configured to acquire the upper limit of the actual pre-charge ratio, the lower limit of the actual pre-charge ratio, and the maximum pre-charge time of the battery pack during the pre-charge process.

[0092] In some embodiments, the determining module 202 is further specifically configured to determine a target time based on the upper limit of the pre-charging ratio and the maximum pre-charging time of the battery pack; determine whether the relay with delayed power-on meets the relay life requirement according to the lower limit of the pre-charging ratio and the target time; if it meets, determine a target setting threshold according to the lower limit of the pre-charging ratio, the target time, and the relay life requirement; if it does not meet, repeat the above steps until a target setting threshold is determined.

[0093] In some embodiments, the determining module 202 is further specifically configured to determine the pre-charging ratio at each moment based on the pre-charging ratio time curve of the battery pack; determine the target time according to the principle that after delaying the target time by the pre-charging time corresponding to the upper limit of the pre-charging ratio, it does not exceed the maximum pre-charging time of the battery pack.

[0094] In some embodiments, the determining module 202 is further specifically configured to determine the pre-charging ratio at each moment based on the pre-charging ratio time curve of the battery pack; delay the moment corresponding to the lower limit of the pre-charging ratio by the target time to obtain a target lower limit of the pre-charging ratio; determine a target setting threshold according to the principle that the target lower limit of the pre-charging ratio meets the relay life requirement and the principle that after delaying the target time by the pre-charging time corresponding to the upper limit of the pre-charging ratio, it does not exceed the maximum pre-charging time of the battery pack.

[0095] In some embodiments, the control module 203 is further specifically configured to detect the pre-charging ratio of the battery pack by means of voltage sampling; when the pre-charging ratio reaches the target setting threshold, wait for the target time to elapse and then control the relay to power on and close.

[0096] In some embodiments, before the step of delaying the target time and then controlling the relay to power on when the determining module 202 detects that the pre-charging ratio of the battery pack reaches the target setting threshold, the determining module 202 is further specifically configured to lower the initial setting threshold of the preset ratio of the battery to obtain a target setting threshold.

[0097] Figure 5 The following is a schematic hardware architecture diagram of the electronic device 300 provided by the embodiments of the present invention. Refer to Figure 5 As shown, the electronic device 300 includes: a machine-readable storage medium 301 and a processor 302, and may further include a non-volatile storage medium 303, a communication interface 304, and a bus 305; wherein, the machine-readable storage medium 301, the processor 302, the non-volatile storage medium 303, and the communication interface 304 communicate with each other through the bus 305. The processor 302 can execute the machine-executable instructions for controlling the power-on of the relay described in the above embodiments by reading and executing the machine-readable storage medium 301.

[0098] The machine-readable storage medium mentioned in this document can be any electronic, magnetic, optical, or other physical storage device that can contain or store information such as executable instructions, data, etc. For example, the machine-readable storage medium can be: RAM (Random Access Memory), volatile memory, non-volatile memory, flash memory, storage drives (such as hard disk drives), any type of storage disk (such as optical discs, DVDs, etc.), or similar storage media, or a combination thereof.

[0099] The non-volatile medium can be non-volatile memory, flash memory, storage drives (such as hard disk drives), any type of storage disk (such as optical discs, DVDs, etc.), or similar non-volatile storage media, or a combination thereof.

[0100] It can be understood that the specific operation methods of the functional modules in this embodiment can refer to the detailed descriptions of the corresponding steps in the above method embodiment, and will not be repeated here.

[0101] The computer-readable storage medium provided by the embodiment of the present invention stores a computer program, and when the computer program code is executed, it can implement the power-on control method of the relay described in any of the above embodiments. For the specific implementation, refer to the method embodiment and will not be elaborated here.

[0102] Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the above-described systems and devices can refer to the corresponding processes in the foregoing method embodiments and will not be repeated here.

[0103] In addition, in the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0104] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0105] Finally, it should be noted that the above-described embodiments are only specific embodiments of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit it. The protection scope of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that any person skilled in the art within the technical scope disclosed by the present invention can still modify the technical solutions recorded in the foregoing embodiments or can easily conceive of changes, or perform equivalent replacements for some of the technical features; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the protection scope of the present invention.

Claims

1. A power-on control method for a relay, characterized in that, The method includes: Obtaining the actual upper limit and lower limit of the pre-charge ratio of the battery pack; Based on the upper limit of the pre-charge ratio, the lower limit of the pre-charge ratio, the maximum pre-charge time of the battery pack, and the relay life requirement, determining a target setting threshold and a target time; When it is detected that the pre-charge ratio of the battery pack reaches the target setting threshold, delaying the target time and then controlling the relay to be powered on; The step of determining a target setting threshold and a target time based on the upper limit of the pre-charge ratio, the lower limit of the pre-charge ratio, the maximum pre-charge time of the battery pack, and the relay life requirement includes: Based on the upper limit of the pre-charge ratio and the maximum pre-charge time of the battery pack, determining the target time; According to the lower limit of the pre-charge ratio and the target time, determining whether the relay with delayed power-on meets the relay life requirement; If it meets, determining the target setting threshold according to the lower limit of the pre-charge ratio, the target time, and the relay life requirement; If it does not meet, repeating the above steps until the target setting threshold is determined.

2. The method according to claim 1, characterized in that, The step of obtaining the actual upper limit and lower limit of the pre-charge ratio of the battery pack includes: Obtaining the actual upper limit of the pre-charge ratio, the lower limit of the pre-charge ratio, and the maximum pre-charge time of the battery pack during the pre-charge process.

3. The method according to claim 1, characterized in that, The step of determining the target time based on the upper limit of the pre-charge ratio and the maximum pre-charge time of the battery pack includes: Based on the pre-charge ratio time curve of the battery pack, determining the pre-charge ratio at each moment; According to the principle that after delaying the target time by the pre-charge time corresponding to the upper limit of the pre-charge ratio, it does not exceed the maximum pre-charge time of the battery pack, determining the target time.

4. The method according to claim 1, wherein The step of determining the target setting threshold according to the lower limit of the pre-charge ratio, the target time, and the relay life requirement includes: Based on the pre-charge ratio time curve of the battery pack, determining the pre-charge ratio at each moment; Delaying the moment corresponding to the lower limit of the pre-charge ratio by the target time to obtain the target lower limit of the pre-charge ratio; According to the principle that the target lower limit of the pre-charge ratio meets the relay life requirement and the principle that after delaying the target time by the pre-charge time corresponding to the upper limit of the pre-charge ratio, it does not exceed the maximum pre-charge time of the battery pack, determining the target setting threshold.

5. The method according to claim 1, wherein The step of when it is detected that the pre-charge ratio of the battery pack reaches the target setting threshold, delaying the target time and then controlling the relay to be powered on includes: Detecting the pre-charge ratio of the battery pack by means of voltage sampling; When the pre-charge ratio reaches the target setting threshold, waiting for the target time to be delayed and then controlling the relay to be powered on and closed.

6. The method according to claim 1, characterized in that, Before the step of when it is detected that the pre-charge ratio of the battery pack reaches the target setting threshold, delaying the target time and then controlling the relay to be powered on, the method further includes: Lowering the initial setting threshold of the pre-charge ratio of the battery pack to obtain the target setting threshold.

7. An on - power control device for a relay, characterized in that, The device includes: An acquisition module for acquiring the actual upper limit and lower limit of the pre-charge ratio of the battery pack; A determination module for determining a target setting threshold and a target time based on the upper limit of the pre-charge ratio, the lower limit of the pre-charge ratio, the maximum pre-charge time of the battery pack, and the relay life requirement; The control module, when detecting that the pre-charge ratio of the battery pack reaches the target set threshold, delays the target time and then controls the relay to be powered on; The determination module is further configured to determine the target time based on the upper limit of the pre-charge ratio and the maximum pre-charge time of the battery pack; determine whether the relay with delayed power-on meets the relay life requirement according to the lower limit of the pre-charge ratio and the target time; if it meets, determine the target set threshold according to the lower limit of the pre-charge ratio, the target time and the relay life requirement; if it does not meet, repeat the above steps until the target set threshold is determined.

8. An electronic device, comprising a memory and a processor, wherein a computer program that can run on the processor is stored in the memory, and is characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 6 above.

9. A machine-readable storage medium, characterized in that, The machine-readable storage medium stores machine-executable instructions, and when the machine-executable instructions are called and executed by the processor, the machine-executable instructions cause the processor to implement the steps of the method according to any one of claims 1 to 6.

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